Rassenonderzoek triticale 2018https://biblio.ugent.be/publication/8584976
Derycke, VeerleHaesaert, GeertMartens, LucMartens, DirkDe Koker, Johan2018application/pdfhttps://biblio.ugent.be/publication/8584976http://hdl.handle.net/1854/LU-8584976https://biblio.ugent.be/publication/8584976/file/8584981dutLCGI have transferred the copyright for this publication to the publisherinfo:eu-repo/semantics/openAccessGraanberichtAgriculture and Food SciencestriticaleRassenonderzoek triticale 2018miscinfo:eu-repo/semantics/reportinfo:eu-repo/semantics/publishedVersionCombining high yields and blast resistance in rice (Oryza spp.) : a screening under upland and lowland conditions in Beninhttps://biblio.ugent.be/publication/8600638
Yelome, Octaviano Igor NoudehouenouAudenaert, KrisLandschoot, SofieDansi, AlexandreVanhove, WouterSilue, DrissaVan Damme, PatrickHaesaert, Geert2018The future security of the supply of rice for food in Africa depends on improving the level of local production to achieve self-sufficiency. In order to cope with the existing gap between production and actual demand, combining a high level of rice blast tolerance and a high-yield potential is necessary. The current study was conducted under upland and lowland conditions in Benin to gain insight into the performance of selected blast-resistant accessions along with some currently grown varieties. This study revealed a high phenotypic variability among these accessions. Furthermore, differences in the performance of these accessions under lowland and upland conditions were observed. Principal component analysis showed their grouping in three clusters. The analysis also demonstrated a high yield potential among the blast-resistant rice accessions whether they were Oryza sativa or O. glaberrima. Furthermore, there was a significant correlation between yield and both spikelet fertility and growth cycle duration. In conclusion, the present study identified promising rice accessions for future breeding. High phenotypic variability in combination with interesting traits can help to develop new resilient varieties. Finally, when the traits correlate with yield, they can be used as markers for an early screening method for identifying promising accessions at an early stage.application/pdfhttps://biblio.ugent.be/publication/8600638http://hdl.handle.net/1854/LU-8600638http://dx.doi.org/10.3390/su10072500https://biblio.ugent.be/publication/8600638/file/8600639engCreative Commons Attribution 4.0 International Public License (CC-BY 4.0)info:eu-repo/semantics/openAccessSUSTAINABILITYISSN: 2071-1050Agriculture and Food SciencesBiology and Life Sciencesricebreedingblastfood securityhigh-yield potentialMAGNAPORTHE-ORYZAENERICAGLABERRIMAVARIETIESAFRICAIMPACTFEEDFOODCombining high yields and blast resistance in rice (Oryza spp.) : a screening under upland and lowland conditions in BeninjournalArticleinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionGreen leaf volatile production by plants : a meta-analysishttps://biblio.ugent.be/publication/8527716
Ameye, MaartenAllmann, SilkeVerwaeren, JanSmagghe, GuyHaesaert, GeertSchuurink, Robert CAudenaert, Kris2018Plants respond to stress by releasing biogenic volatile organic compounds (BVOCs). Green leaf volatiles (GLVs), which are abundantly produced across the plant kingdom, comprise an important group within the BVOCs. They can repel or attract herbivores and their natural enemies; and they can induce plant defences or prime plants for enhanced defence against herbivores and pathogens and can have direct toxic effects on bacteria and fungi. Unlike other volatiles, GLVs are released almost instantly upon mechanical damage and (a)biotic stress and could thus function as an immediate and informative signal for many organisms in the plant's environment. We used a meta-analysis approach in which data from the literature on GLV production during biotic stress responses were compiled and interpreted. We identified that different types of attackers and feeding styles add a degree of complexity to the amount of emitted GLVs, compared with wounding alone. This meta-analysis illustrates that there is less variation in the GLV profile than we presumed, that pathogens induce more GLVs than insects and wounding, and that there are clear differences in GLV emission between monocots and dicots. Besides the meta-analysis, this review provides an update on recent insights into the perception and signalling of GLVs in plants.application/pdfhttps://biblio.ugent.be/publication/8527716http://hdl.handle.net/1854/LU-8527716http://dx.doi.org/10.1111/nph.14671https://biblio.ugent.be/publication/8527716/file/8603893engI have transferred the copyright for this publication to the publisherinfo:eu-repo/semantics/restrictedAccessNEW PHYTOLOGISTISSN: 0028-646XBiology and Life Sciencesdicotfungusgreen leaf volatile (GLV)herbivoremeta-analysismonocotpathogenALLENE OXIDE SYNTHASEORGANIC-COMPOUND EMISSIONSOLFACTORY RECEPTOR NEURONSACID HYDROPEROXIDE LYASENICOTIANA-ATTENUATADEFENSE RESPONSESBOTRYTIS-CINEREAJASMONIC ACIDARABIDOPSIS-THALIANALIPOXYGENASE PATHWAYGreen leaf volatile production by plants : a meta-analysisjournalArticleinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionExploring genetic diversity and disease response of cultivated rice accessions (Oryza spp.) against Pyricularia oryzae under rainfed upland conditions in Beninhttps://biblio.ugent.be/publication/8600636
Yelome, Octaviano Igor NoudehouenouAudenaert, KrisLandschoot, SofieDansi, AlexandreVanhove, WouterSilue, DrissaVan Damme, PatrickHaesaert, Geert2018The main goal of this study is to gain insight into the relationship between the genetic profile of cultivated rice (Oryza spp.) accessions and their resistance to rice blast. Therefore, the genetic and phenotypic variability of a set of 350 cultivated rice accessions originating from Africa (Benin, Mali and Nigeria, Ivory Coast etc.) was examined. Seventy-seven fluorescent amplified fragment polymorphism (AFLP) markers were used to gain insight into the genetic variation and to classify the germplasm collection. In addition, the rice germplasm was assessed for its resistance to blast disease caused by Pyricularia oryzae in upland field conditions. Huge differences in responses of rice accessions to P. oryzae were observed, ranging from highly susceptible to highly resistant. Twelve percent of all accessions were highly resistant to P. oryzae. Based on their AFLP marker profile these highly resistant accessions could be separated from the other accessions. Stepwise regression revealed that the best prediction of the blast resistance level was achieved with a maximum number of 13 AFLP markers. Marker CTA22 was the most important for accurate prediction of blast resistance, this marker was present in all highly resistant accessions. It can be concluded that AFLP markers are a valuable tool to screen rice accessions for their susceptibility towards blast disease and that, based on a subset of markers, it is possible to predict the resistance to rice blast.application/pdfhttps://biblio.ugent.be/publication/8600636http://hdl.handle.net/1854/LU-8600636http://dx.doi.org/10.1007/s10722-018-0638-1https://biblio.ugent.be/publication/8600636/file/8600637engI have transferred the copyright for this publication to the publisherinfo:eu-repo/semantics/restrictedAccessGENETIC RESOURCES AND CROP EVOLUTIONISSN: 0925-9864ISSN: 1573-5109Biology and Life SciencesFluorescent-AFLPGenetic diversityRiceBlastBLAST RESISTANCEPOPULATION-STRUCTUREMAGNAPORTHE-ORYZAELENGTH-POLYMORPHISMSGLABERRIMA STEUD.BROAD-SPECTRUMSATIVASEQUENCEIDENTIFICATIONINHERITANCEExploring genetic diversity and disease response of cultivated rice accessions (Oryza spp.) against Pyricularia oryzae under rainfed upland conditions in BeninjournalArticleinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAnalysis of population structure and genetic diversity reveals gene flow and geographic patterns in cultivated rice (O. sativa and O. glaberrima) in West Africahttps://biblio.ugent.be/publication/8600634
Yelome, Octaviano Igor NoudehouenouAudenaert, KrisLandschoot, SofieDansi, AlexandreVanhove, WouterSilue, DrissaVan Damme, PatrickHaesaert, Geert2018To fully exploit the diversity in African rice germplasm and to broaden the gene pool reliable information on the population genetic diversity and phenotypic characteristics is a prerequisite. In this paper, the population structure and genetic diversity of 42 cultivated African rice (Oryza spp.) accessions originating from West Africa (Benin, Mali and Nigeria, Liberia etc.) were investigated using 20 simple sequence repeats (SSR) and 77 amplified fragment length polymorphisms (AFLP). Additionally, field trials were set up to gain insight into phenotypic characteristics that differentiate the genetic populations among rice accessions. The analysis revealed considerably high polymorphisms for SSR markers (PIC mean=0.78) in the germplasm studied. A significant association was found between AFLP markers and geographic origin of rice accessions (R=0.72). Germplasm structure showed that Oryza sativa accessions were not totally isolated from Oryza glaberrima accessions. The results allowed identification of five O. glaberrima accessions which grouped together with O. sativa accessions, sharing common alleles of 18 loci out of the 20 SSR markers analyzed. Population structure analysis revealed existence of a gene flow between O. sativa and O. glaberrima rice accessions which can be used to combine several interesting traits in breeding programs. Further studies are needed to clarify the contributions of this gene flow to valuable traits such as abiotic and biotic stresses including disease resistance.application/pdfhttps://biblio.ugent.be/publication/8600634http://hdl.handle.net/1854/LU-8600634http://dx.doi.org/10.1007/s10681-018-2285-1https://biblio.ugent.be/publication/8600634/file/8600635engI have transferred the copyright for this publication to the publisherinfo:eu-repo/semantics/restrictedAccessEUPHYTICAISSN: 0014-2336ISSN: 1573-5060Biology and Life SciencesAmplified fragment length polymorphismGenetic diversityGene flowRiceSimple sequence repeatsFRAGMENT-LENGTH-POLYMORPHISMSMICROSATELLITE MARKERSSSR MARKERSMOLECULAR CHARACTERIZATIONSEQUENCEADAPTATIONAFLPDNAL.EVOLUTIONAnalysis of population structure and genetic diversity reveals gene flow and geographic patterns in cultivated rice (O. sativa and O. glaberrima) in West AfricajournalArticleinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPotentials and limitations of a growing degree day approach to predict the phenology of cereal leaf beetleshttps://biblio.ugent.be/publication/8564632
Van de Vijver, EliasLandschoot, SofieSmagghe, GuyDe Baets, BernardTemmerman, FemkeDillen, JillHaesaert, Geert2018Cereal leaf beetles (CLBs) are described as an invasive pest of small grain cereals in many regions worldwide. Prediction models aimed to prevent yield losses caused by these feeding insects have been developed by researchers all over the world. As a foundation for many of these prediction models, it is known that a specific number of heat units, or growing degree days (GDDs), is required for an insect to complete a certain physiological process. In this paper, we overview the existing GDD models for CLBs. Furthermore, we used our Belgian input data to compare model predictions with our own observations.Though, the existing models were not able to predict the seasonal trends present in our data: the occurrence of various life stages were monitored earlier then the model predicted. Hence, a weighted GDD model was tested on the data as well: the accumulated GDDs during certain periods were balanced according to the significance of this period for the insect. Rainfall and/or relative humidity were included as well. Based on these selected variables, multiple linear regression models, ridge regression models, and regression trees were fitted. This approach performed considerably better compared to the simple accumulation of GDD. However, based on cross-year cross-location validation method, to gain insight in the future performance of the models, the accuracy was still too low to serve as an accurate warning tool.application/pdfhttps://biblio.ugent.be/publication/8564632http://hdl.handle.net/1854/LU-8564632http://dx.doi.org/10.1093/ee/nvy081https://biblio.ugent.be/publication/8564632/file/8599265engI have transferred the copyright for this publication to the publisherinfo:eu-repo/semantics/restrictedAccessENVIRONMENTAL ENTOMOLOGYISSN: 0046-225XBiology and Life Sciencescereal leaf beetlegrowing degree daymodelingwinter wheatOULEMA-MELANOPUS COLEOPTERAFUSARIUM HEAD BLIGHTTETRASTICHUS-JULISCHRYSOMELIDAE EGGWINTER-WHEATPOPULATIONSMODELMANAGEMENTDISEASESTIMEPotentials and limitations of a growing degree day approach to predict the phenology of cereal leaf beetlesjournalArticleinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionEffects of storage conditions and humic substances on the germination capacity of wheat and spinach seedshttps://biblio.ugent.be/publication/8583156
Lohwasser, UlrikeBörner, AndreasLandschoot, SofieDerycke, VeerleCarrette, JasperBörner, AndreasHaesaert, Geert2018application/pdfhttps://biblio.ugent.be/publication/8583156http://hdl.handle.net/1854/LU-8583156https://biblio.ugent.be/publication/8583156/file/8583162engI have transferred the copyright for this publication to the publisherinfo:eu-repo/semantics/openAccessTesting Methods and Research on Seed Quality, AbstractsAgriculture and Food Sciencesgerminationhumic substancesspinachstorage conditionswheatEffects of storage conditions and humic substances on the germination capacity of wheat and spinach seedsconferenceinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion